Biology, Pages 334-346Neil Campbell and Jane Reece's BIOLOGY remains unsurpassed as the most successful majors biology textbook in the world. This text has invited more than 4 million students into the study of this dynamic and essential discipline. |
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Page 5
... smaller and simpler still ( Figure 18.2 ) . Lacking the structures and metabolic machinery found in cells , most viruses are little more than genes packaged in protein coats . We will begin with the structure of these simplest of all ...
... smaller and simpler still ( Figure 18.2 ) . Lacking the structures and metabolic machinery found in cells , most viruses are little more than genes packaged in protein coats . We will begin with the structure of these simplest of all ...
Page 9
... Unlike bacteria , the mysterious agent of mosaic disease could not be cultivated on nutrient media in test tubes or petri dishes . Beijerinck imagined a reproducing particle much smaller and simpler than bacteria . His 9.
... Unlike bacteria , the mysterious agent of mosaic disease could not be cultivated on nutrient media in test tubes or petri dishes . Beijerinck imagined a reproducing particle much smaller and simpler than bacteria . His 9.
Page 10
... smaller than a ribosome . Millions could easily fit on a pinhead . Even the largest viruses are barely visible in the light microscope . Stanley's discovery that some viruses could be crystallized was exciting and puzzling news . Not 10.
... smaller than a ribosome . Millions could easily fit on a pinhead . Even the largest viruses are barely visible in the light microscope . Stanley's discovery that some viruses could be crystallized was exciting and puzzling news . Not 10.
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animal viruses bacterial cell bacterial chromosome bacteriophage bacterium bind to specific capsid cause disease cellular enzymes circular coli cell Cycles of Phages DNA molecule double-stranded emerging viruses enter the host enveloped viruses eukaryotes existing viruses Figure genetic recombination glycoproteins herpesvirus host cell host range host species human disease immune system kill the host lysogenic cycle lytic cycle mechanisms membranous envelope microbes model systems mosaic virus TMV mRNA mutation natural selection favors nucleic acid obligate intracellular parasites particles phage DNA plant to plant plant viruses plasmids plasmodesmata polymerase prions prokaryotic prophage genes protein coat provirus restriction enzymes retrovirus reverse transcriptase RNA viruses Scientists simplest spread stranded RNA symptoms syndrome synthesis temperate phage template tobacco mosaic virus transcribed transposons type of virus vaccines vertical transmission viral diseases viral DNA viral envelope viral genome viral infection viral nucleic acid viral proteins viral reproductive cycle viroids virulent phage viruses and bacteria viruses cause